Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e33ea483c459f7a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 07:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fd3971996144cc607904fc4144fda15c SHA-1: aa58463a49548782828aa598884ca065ea38e76c SHA-256: 9e33ea483c459f7a3ac618f8caea5cb9c07a7393de8e2b6dadd945bdbb2f6ccf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites, likely via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kehlux.lu/userfiles/files/kerewoditufeteka.pdf In PDF document text
    • https://robodom.si/files_vsebine/kuzerameleduxanim.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/53659662868.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130222484290---2788583248.pdfIn PDF document text
    • https://gilbertems.com/videos/file/59908103919.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/63005467497.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/39805994204.pdfIn PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/jenotubetopibunamov.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/19363538406133d22968fd2.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/82824131432.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339e501d4ce---38696014652.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/23440711907.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/gesupebuke.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/kuwopap.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/99186929216.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6046741e8---29939698974.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/87401692874.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/kerelipujiwusirudidi.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/92447710348.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f96b0e14c6---bazukadizivudekozuti.pdfIn PDF document text
    • https://olterus.org/contents/files/98642331395.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090416535033782.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/tamejubamarevatowomevoxa.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210909091248_ofnsm3.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/kakuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=free+fire+low+mb+download+2021PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 10748 bytes
SHA-256: b56bb9c4f3ded6da7b523fa562d81486e3f9dd475187a251883553375f12c161
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 17200 bytes
SHA-256: 114526f9305e15a7624b49d6ca2ba56ace10302efa09a0c0067a64b691a3dd32
font_02_sfnt_off000122b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.